Passage

Read the following information carefully to answer the questions Rohit have some articles which are in the form of different structures. These are cylindrical, conical, and spherical. Other than solid conical structure, all two are of both types i.e., hollow as well as solid. Volume of a conical article is three times of the volume of a solid cylindrical article while radius of a solid spherical article is half than that the radius of a conical article. Outer radius of hollow cylindrical article is same as radius of solid spherical article while average of outer radius and inner radius of hollow cylindrical article is equal to radius of solid cylindrical article. Height of cylindrical, conical and hollow cylindrical article is same i.e. 14cm Number of solid spherical article is 1/5 of total number of article Rohit have. Number of hollow spherical article is 150% more than number of conical article. Ratio between numbers of solid cylindrical article to number of conical article is 3:2. Total number of hollow cylindrical article is 40% of total numbers of article Rohit have and also ‘20’ more than the total number of solid spherical article Rohit have. Volume of a hollow spherical article is 33,957 cm 3 whose inner radius is half of its outer radius. Volume of a hollow spherical article is 5.25 time of volume of conical article.

Find the curved surface area of one hollow cylindrical article?